The 'I don't like this photo' link (aka Dislike Button) is an important part of the 500px algorithm. While we can't share the details of how our algorithm works (it's part of the magic!) there are some things every user should know.
Who can Dislike photos?
The Dislike Button is dynamically enabled or disabled for users based on a few variables. It's determined by our system based on your Affection score, having a trusted history with 500px (meaning no copyright abuse or any other infringements of our Terms of Service) and various other activity in the community. Being granted access to Dislike photos is a sign of our trust and we will have zero tolerance for misuse. Less than 10% of the community will have this option enabled at any time. If you don't have this option enabled, it doesn't mean we don't trust you, you may get the ability in the future, as this is an dynamic feature that is always changing. Each user gets 5 Dislikes per day. This helps ensure no single user of 500px has a large influence on the outcome of our Popular page or other user's success.
If you suspect misuse, please send links and information to email@example.com.
How does it work?
Any photo that is posted publicly on 500px has what is called a Pulse. It's the number found on the right side of your Photo pages. As users Like and Favourite your photo, you Pulse will rise. We use a proprietary algorithm to calculate your Pulse to ensure the best of the best rises to the top and that as many photographers as possible get a chance to be seen. As a part of this process, it means we need a way for users to show their dislike for a photo, thereby lowering it's Pulse. A single Dislike doesn't have a specific value and its value is based on many variables.
It's okay to be disliked. Photography is an art and art is subjective. Not everyone will like your work so don't take it too harshly if you get a few Dislikes on a popular photo. If you feel you are being targeted or abused, please send links and information to firstname.lastname@example.org.
How is 500px improving this system?
In July 2012, we acquired a company called Algo Anywhere. Algo Anywhere specializes in building algorithms that can find the most popular, best quality and most relevant content. We are working very hard to improve our Pulse algorithm to make sure that all the best photos get the attention they deserve and that new photographers get a chance to learn, grow and improve too! Algorithms of the complexity and size that we are working with are incredibly difficult to build. We are dedicated to continuing to build 500px to make it the best it can be.
Your feedback during this process is incredibly valuable. So please don't hesitate to send any suggestions or feedback to us at email@example.com.
Have more questions? Let us know! Email firstname.lastname@example.org or tweet @500px_help